Study of Deterioration Models for Concrete Structures through In Situ Condition Monitoring

Abstract

Performance of concrete structures is significantly influenced and governed by its durability and resistance to environmental or exposure conditions, apart from its physical strength. It can be monitored, evaluated and predicted through laboratory modeling of physical deterioration mechanisms, performance characteristics and parameters and condition monitoring of in-situ concrete structures. One such study has been conducted using Non-destructive testing equipment in the city of Bhopal and around located in India. Some selected parameters influencing durability of reinforced concrete (RC) structures such as concrete cover, carbonation depth, chloride concentration, half cell potential, compressive strength etc. have been measured through covermeter, rainbow indicator, rapid chloride test, Ag/ AgCl half cell, rebound hammer etc., for establishing correlation amongst various parameters and age of structures. Then carbonation and chloride ingress models similar to Fickand#8223;s laws by utilizing the data obtained from in-situ field survey have been developed. newlineA condition rating system is also presented for obtaining present condition of RC structures by using values from field survey. In last a model is newlineIII newlinedeveloped using MATLAB to predict the remaining service life by evaluating present condition of deteriorating RC structures. newline